From Twitter

Is that 　①　 I smell; is mom 　②　, again?
Is there 　③　 here?; I smell 　④　!

Choices:
cooking
fire
cigarettes
smell
someone smoking

The answers are below the images.

Answers And Explanation
Is that ① cooking I smell; is mom ② cooking, again? Cooking is a noun and a verb.
Is there ③ someone smoking here?; I smell ④ cigarettes! Smell is a verb as well as a noun.